擅长:python、mysql、java
<p>正如@U9 Forward所说的,您可以简单地使用while指令而不必<code>== True</code></p>
<pre><code>posx = 0
posy = 0
doForever = True
while doForever:
s = input()
if s == "forward":
posy += 1
print(posy)
elif s == "backward":
posy -= 1
print(posy)
</code></pre>